AD8212 High Voltage Current Shunt Monitor AD8212 Specification Sheet User Guide
Summary
The AD8212 is a sophisticated current shunt monitor designed for high common-mode voltage operation, accurately measuring differential input voltages across shunt resistors. Its robust design supports applications ranging from motor control and DC-to-DC converters to battery and load monitoring in power management systems. This documentation provides comprehensive details on implementing the device, including circuit compensation, functional block diagrams, specialized setups for bidirectional sensing, and detailed operational specifications suitable for engineers designing demanding industrial, automotive, and renewable energy products.
Page 1 Text Content
High Voltage Current Shunt Monitor
AD8212 FEATURES FUNCTIONAL BLOCK DIAGRAM
V+ VSENSE
Adjustable gain High common-mode voltage range
AD8212
7 V to 65 V typical 7 V to >500 V with external pass transistor Current output Integrated 5 V series regulator 8-lead MSOP package
APPLICATIONS Current shunt measurement Motor controls
OUTPUT
DC-to-DC converters CURRENT
COMPENSATION
Power supplies BIAS CIRCUIT
Battery monitoring Remote sensing
IOUT COM BIAS ALPHA
Figure 1.
GENERAL DESCRIPTION The AD8212 is a high common-mode voltage, current shunt Another feature of the AD8212 is high voltage operation, monitor. It accurately amplifies a small differential input voltage which is achieved by using an external high voltage breakdown in the presence of large common-mode voltages up to 65 V PNP transistor. In this configuration, the common-mode range (>500 V with an external PNP transistor). of the AD8212 is equal to the breakdown of the external PNP
transistor. Therefore, operation at several hundred volts is easily
The AD8212 is ideal for current monitoring across a shunt
achieved (see Figure 23).
resistor in applications controlling loads, such as motors and solenoids. The current output of the device is proportional to The AD8212 features a patented output base current compensa- the input differential voltage. The user can select an external tion circuit for high voltage operation mode. This ensures that resistor to set the desired gain. The typical common-mode no base current is lost through the external transistor and voltage range of the AD8212 is 7 V to 65 V. excellent output accuracy is maintained regardless of common-
mode voltage or temperature.
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Page Summary Contents For AD8212 High Voltage Current Shunt Monitor AD8212 Specification Sheet User Guide
Manual Details
| Brand | Current |
|---|---|
| Pages | 16 |
| File Size | 379.73 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
How can I raise the high common-mode voltage limit beyond 65V?
You must use an external PNP transistor for high voltage operation. The expanded common-mode range will then equal the breakdown voltage of that external transistor, making voltages over 500V possible.
Can this monitor measure current flowing in both directions (charging and loading)?
No, the AD8212 is a unidirectional device. To monitor both charge and load currents, you must employ two separate AD8212 devices.
What are some primary applications for the AD8212?
It is ideal for accurate current monitoring in motor controls, DC-to-DC converters, power supplies, and detailed battery monitoring circuits.